I would recommend the rail kit as fit and finish is excellent. You should be aware however that the "kit" only comes with one side plate and 4 screws. When you install the "kit" the screws on the off side do nothing but fill the holes they do not support the lower rail at all. So when you buy the "kit" be aware you have to purchase a second side rail to mount the lower rail onto your, most excellent, Beretta CX4.
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